Persuasion. I think I was saving it; I've read her other five novels, and this was my last Austen to experience for the first time. I know I still have her juvenilia and a few other things to read, but it was bittersweet to finish up her Big Six.
And I loved it. I read it for my book club, and had only five days to do it, but it was such a pleasure. I wish I could have lingered with it a bit longer, but it was also fun to be so immersed in Austen's world for a week.
And I cried when I got to the end. Very sweet! (No spoilers here. Read it!)